public ConstantExpressionResolve(ExpressionParameter parameter) : base(parameter)
{
var expression = base.Expression as ConstantExpression;
var isLeft = parameter.IsLeft;
object value = ExpressionTool.GetValue(expression.Value);
var baseParameter = parameter.BaseParameter;
baseParameter.ChildExpression = expression;
var isSetTempData = baseParameter.CommonTempData.HasValue() && baseParameter.CommonTempData.Equals(CommonTempDataType.Result);
switch (parameter.Context.ResolveType)
{
case ResolveExpressType.SelectSingle:
case ResolveExpressType.Update:
case ResolveExpressType.SelectMultiple:
baseParameter.CommonTempData = value;
break;
case ResolveExpressType.WhereSingle:
case ResolveExpressType.WhereMultiple:
if (isSetTempData)
{
baseParameter.CommonTempData = value;
}
else
{
var parentIsBinary = parameter.BaseParameter.CurrentExpression is BinaryExpression;
var parentIsRoot = parameter.BaseParameter.CurrentExpression is LambdaExpression;
var isBool = value != null && value.GetType() == UtilConstants.BoolType;
if (parentIsRoot && isBool)
{
this.Context.Result.Append(value.ObjToBool() ? this.Context.DbMehtods.True() : this.Context.DbMehtods.False());
break;
}
if (parentIsBinary && isBool)
{
var isLogicOperator =
parameter.BaseExpression.NodeType == ExpressionType.And ||
parameter.BaseExpression.NodeType == ExpressionType.AndAlso ||
parameter.BaseExpression.NodeType == ExpressionType.Or ||
parameter.BaseExpression.NodeType == ExpressionType.OrElse;
if (isLogicOperator)
{
AppendMember(parameter, isLeft, (value.ObjToBool() ? this.Context.DbMehtods.True() : this.Context.DbMehtods.False()));
break;
}
}
if (value == null && parentIsBinary)
{
parameter.BaseParameter.ValueIsNull = true;
value = this.Context.DbMehtods.Null();
}
AppendValue(parameter, isLeft, value);
}
break;
case ResolveExpressType.FieldSingle:
case ResolveExpressType.FieldMultiple:
default:
break;
}
}
